This is massively embarrassing for Putin. Getting counter-invaded by your small, theoretically much weaker neighbour is a joke. And the Ukrainians have faced relatively little resistance. If Putin wasn’t the evil bastard that he is, he’d call time on this pointless, wasteful war.
The concerning thing now is that he can use this Ukrainian incursion into Russia as justification for his claims that the west is trying to destroy Russia, even though he set off this chain of events with his actions.